1. Drug Deaths in America Are Rising Faster Than Ever;J Katz;Drug Deaths in America Are Rising Faster Than Ever,2017
2. Increases in fentanyl-related overdose deaths—Florida and Ohio, 2013–2015;AB Peterson
3. Fentanyl law enforcement submissions and increases in synthetic opioid–involved overdose deaths—27 states, 2013–2014;RM Gladden
4. Illicit use of opioids: is OxyContin a "gateway drug"?;LE Grau,2007
5. Initiation into prescription opioid misuse amongst young injection drug users;SE Lankenau,2012